Catch for swing-closures.



J. H. NELSON.

, CATCH FOR SWING GLOSURES.

APPLIGATIQN FILED Nov.19,19o6.

900,415, I Patented Oct. 6, 1908.

Q u gfiwv e-m 'odi I I a JOHNH. NELSON, OF MADISON, WISCONSIN.

CATCH FOR SWING-CLOSURES.

Specification of Letters Patent.

Patented 0015.6, 1908.

Application filed November I9, 1906. Serial No. 344,005.:

To all whom it may concern:

Be it known that I, JOHN H. NELSON, a citizen of the United States, andresident of Madison, in the county of Dane and State of Wisconsin, haveinvented certain new and useful Improvements in Catches for Swing-Closures; and I do hereby declare that the following is a full, clear,and exact, description thereof.

The object of'my invention is to provide a sim 1e, economical, durableandv ositive catc for doors or the like, the catch eing so arranged asto dispense with a hand releasing lglrip, thereby obviatin any, cuttingof the inged member to whic it is attached in order that a connectionfrom the outside may be had; said invention therefore consists invarlous peeullaritles of construction and com bination of parts ashereinafter fully set forth with reference to the accompanying drawings,and subsequently claimed. I

In the drawmgs: Figure 1 re -resents a cross-section of a door and frame1 lustrating a catch embodying the features of my invention a pliedthereto, the door being aj ar, with t e catch in its unlocked positionresting upon a gripping-plate; preparatory to being actuated thereby (ift in) to catch said door and draw it tightly against said door-frameFig. 2, a similar view showin the door closed; .and the position assumeby the parts of the catch with relation to the door in this position,the other position of said catch being shown in dotted ines as the dooris swung open, and Fig. 8, an inverted perspective view of the catch inits locked. position, detached from the door.

Referring by letter to the drawings, A indicates a door having a knob A,the door being hinged to a frame or casing B of any suitable structure.Fast upon the inner side of the door adjacent to the front edge of sameis the flange O of a bracket C, and in ivotal connection with thisbracket is a' tum ler recessed to provide tappet-fingers E, E, one ofwhich fingers has an aperture therein engaged by the end a of a lowerbranch of a spiral spring F. The end I) of an upper branch of the springis engaged with an aperture insaid bracket, there being a crossing ofsaid spring branches. The bracket C is path o e door is pushed shownrprovided with a stop shoulder a in the the end a of the lower branch ofthe spring F to limit backward rock of the tumb er when the door A isopened, and the u per branch of the spring is in the path of saidtumbler on its forward rock Secured to the doorframe is a grippingplateG having a tongue (1 projecting into the path of the tumbler-fingers sothat in o enmg or closing of the door said fingers wi 1 be alternatelyactuated thereby.

Assumin the door to be in the position shown in Fig. 2, a furtherclosing movement will cause the finger E, in contact with the tongue dof the gripping-plate G to rock the tumbler on its pivot and cause thesame to straddle said tongue. This movement causes a swing of the springon the pivot-end b of its upper branch, and due to the rock of saidtumbler there is a contraction of the previously expanded spring, theend a of same passing across and forward of a line ac-x crossing thetumbler axis in Fig. 1. The contraction of the spring also causes thetumbler fin er'E to exert a leverage on the tongue (1 o the grippinglateG, whereby the door is automatically drawn tight in its seat by the timesaid tumbler comes in contact with the upper branch of the spring in itsVpath.

hen the door is opened a reverse rock of the tumbler takes place and thespring is exbranches 1n pivotal connection with said bracket andtumbler, one'of these branches being in the path of the tumbler, a gripingplate attachable to the closure frame or engagement with thetumbler-recess on swing of the closureto its seat, said s ring havingswing in connection with t e aforesaid bracket coincident with expansionand 0011- the county of Dane and State of Wisconsin traction incidentalto pivotal play of said in the presence of two witnesses.

tumbler, and means'for limiting contraction of the aforesaid spring whenthe aforesaid NELSON 5 tumbler clears the gri ping-plate. Witnesses:

In testimony that claim the foregoing I MARY H. MAIN,

have hereunto set my hand at Madison in W. E. MAIN.

